I think we should be prepared, given environmental and political change for large-scale migration. If sea levels rise and 200 million people in Bangladesh and 300 million people in Indonesia need to move, and the entire Chinese seaboard, New York City - that's going to be huge.

The animosity between India and Pakistan is deeply unfortunate and dangerous, and it's something I've long campaigned to reduce. But right now, when there's artillery being exchanged in Kashmir - which is not for from here, either - and there are 100-ish nuclear weapons on each side of the border, there's never really been a case like this where two nuclear armed countries are happily shelling each other.

And also I think the rise of other, you could say, destinations for international jihadis mean that Pakistan isn't necessarily the place where people from all over the world who want to engage in these activities gravitate to. They're going now to places like Syria or Yemen Libya, elsewhere.

What did I think of Princeton? Well, the answer to that question requires a story. When I first arrived, I looked around me at the Gothic buildings - younger, I later learned, than many of the mosques of this city, but made through acid treatment and ingenious stone-masonry to look older.

And I ask myself what it is about me that makes this wonderful, beautiful woman return. Is it because I'm pathetic, helpless in my current state, completely dependent on her? Or is it my sense of humour, my willingness to tease her, to joke my way into painful, secret places? Do I help her understand herself? Do I make her happy? Do I do something for her that her husband and son can't do? Has she fallen in love with me? As the days pass and I continue to heal, my body knitting itself back together, I begin to allow myself to think that she has.

Transience is what is normal. The problem is that we are busily trying to create political structures and cultural expressions that deny that and to deny that is to deny the basic idea of what is human.

I don't want to be anxious on my day-to-day life. I want to try to imagine a future I'd like to live in and then write books and do things that, in my own small way, make it more likely that that future will come to exist.